Question

Draw a timing diagram for the circuit in the figure below. Show
thewaveforms that can be observed on all wires in the
circuits.

Can someone help me with this one please. The NOT gates
areconfusing me. Will rate lifesaver for a thorough
detaileddescription of how to solve this problem. I was thinking
that atruth table would make it a bit easier to make a timing
diagram,but like I say, the NOT gates are confusing me for some
reason.